Liber maiolichinus de gestis Pisanorum illustribus
The Liber maiolichinus de gestis pisanorum illustribus is a Medieval Latin epic chronicle in 3,500 hexameters, written between 1117 and 1125, detailing the Pisan-led 1113–1115 [Balearic Islands expedition|joint military expedition] of Italians, Catalans, and Occitans against the taifa of the Balearic Islands, in particular Majorca and Ibiza, in 1113-5. The commune of Pisa commissioned it, and its anonymous author was probably a cleric. It survives in three manuscripts. The Liber is notable for containing the earliest known reference to "Catalans", treated as an ethnicity, and to "Catalonia", as their homeland.
The Liber, which is the most important primary source for the brief conquest of the Balearics, portrays the expedition as motivated by a desire to free Christian captives held as slaves by the Muslims and to curtail Muslim piracy "from Spain to Greece." Christian zeal is stressed no less than civic pride, and the account of the 1113 expedition is prefaced by a history of Pisan-Muslim conflicts in the eleventh century. The Liber is also the earliest source for the raid of the Norwegian king Sigurd Jorsalfar on Formentera, one of the Balearic islands and a hotbed of piracy.